Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e877260124ee433…

MALICIOUS

PDF

75.0 KB Created: 2021-01-05 19:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bfb395e0a8c49726374891abd1432053 SHA-1: 786e85fc9c360019ffdd9286367645de01f419ec SHA-256: 1e877260124ee4334c968889851300d874ef1564e48e509d0ac649d390772c4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, directing users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/aws?utm_term=cover+letter+reporting+specialist PDF link annotation
    • https://cdn.sqhk.co/vuramufef/hbibjaM/menup.pdfIn PDF document text
    • https://wedagibawarog.weebly.com/uploads/1/3/4/6/134680751/lemegoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_5fa63c29580d1.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/izggiig/28891194693.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/ifOIRvA/french_toe_nail_designs_with_rhinestones.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fbcc7fc66ccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6664d3c5-7bf9-49c0-a86d-d90b356e6bea/zawabarafiruwum.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/abas-_3_online_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3410dece-8311-477c-bf4a-77321e322309/52636412966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49daf3fa-ddd7-4be4-8a7b-e032339eb795/90586090564.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/badshah_picture_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/43497306605.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/liziwepaguzigefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04903154-a116-4ae6-af8b-08acc05d75f2/jm_tull_gwinnett_family_ymca_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c5acb4-1d9c-4f66-a925-9699b2ae4221/51275068589.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 5064 bytes
SHA-256: 2afc8e789da441852d9ec0d7d60a52a894993f95fbf13d0fbcd50da725bc6115
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 10776 bytes
SHA-256: a6cd631ad4e175d1376a06f5167e650984eb1c290c5c9424bc468e0f9a09b7af

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